Department of Environmental Engineering, Shanghai University, 333 Nanchen Road, Shanghai 200444, PR China.
Bioresour Technol. 2010 Mar;101(5):1447-52. doi: 10.1016/j.biortech.2009.07.003. Epub 2009 Jul 28.
This research investigated the anaerobic biodegradation of fresh leachate from pretreated municipal solid waste (MSW) in an expanded granular sludge bed (EGSB) bioreactor under mesophilic conditions. The observations showed that this bioreactor, inoculated with anaerobic granular sludge, could be readily activated. The chemical oxygen demand (COD) removal efficiency varied between 88% and 97% under normal operation conditions, and was kept at 94-96% under the proposed optimal conditions. We noted that 60-80% of the produced biogas was methane that was yielded at a rate depending on the organic loading rate (OLR) and the liquid up-flow velocity (Vup). Significantly, 80% of loaded COD or 83% of biodegraded COD was converted to methane under the proposed optimal conditions. These findings indicate that the fresh leachate from pretreated MSW can be efficiently treated in the EGSB bioreactor, and moreover, methane, a renewable energy, can be continuously generated.
本研究在中温条件下，采用膨胀颗粒污泥床（EGSB）生物反应器对预处理城市固体废物（MSW）的新鲜渗滤液进行了厌氧生物降解研究。结果表明，该生物反应器接种厌氧颗粒污泥后可迅速被激活。在正常运行条件下，COD 去除效率在 88%至 97%之间，在提出的最佳条件下保持在 94-96%。我们注意到，产生的沼气中有 60-80%是甲烷，其产率取决于有机负荷率（OLR）和液体上流速（Vup）。重要的是，在提出的最佳条件下，80%的加载 COD 或 83%的生物降解 COD 转化为甲烷。这些发现表明，预处理 MSW 的新鲜渗滤液可以在 EGSB 生物反应器中有效地处理，而且可以连续产生可再生能源甲烷。
